Yaesu FT DX 3000 Operating Manual

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Page 81FT DX 3000 O peraTing M anualcw spOTTing (zerO-beATing)“Spotting” (zeroing in on another CW station) is a handy technique to ensure you and the other station are precisely onthe same frequency.The Tuning Offset Indicator in the display may also be moved so you can adjust your receiver frequency to center theincoming station on the pitch corresponding to that of your transmitted signal.Using the Auto Zeroing SystemPress the [p /q /t /u ] button to select the “ZIN/SPOT”. Press the [SELECT] switch momentary to ad-just the receiving frequency to the zero-in automaticallywhile receiving the CW signal.Using the SPOT SystemPress the [p /q /t /u ] button to select the “ZIN/SPOT”. Press the [MONI] button, then while pressingthe front panel [SELECT] button, the Spot tone will beheard through your speaker. This tone corresponds to thepitch of your transmitted signal. If you adjust the receiv-er frequency until the pitch of the received CW signalmatches that of the Spot tone, your transmitted signalwill be precisely matched to that of the other station.Release the [SELECT] button to turn the Spot tone off.A dvice : In a tough DX pile-up, you may actually want touse the SPOT system to find a “gap” in the spreadof calling stations, instead of zeroing in preciselyon the last station being worked by the DX station.From the DX side, if a dozen or more operators (alsousing Yaesu’s SPOT system) all call precisely on thesame frequency, their dots and dashes merge into asingle, long tone that the DX station cannot decipher.In such situations, calling slightly higher or lower infrequency may get your call through. The Tuning Offset Indicator in the display may beutilized for CW frequency adjustment, as well. Itsconfiguration is set via Menu item “010 BAR DIS-PLAY SELECT” at the factory, and the Tuning OffsetIndicator is already set to the “CW TUNE” selection.QUick pOinTs: The CW Spotting process utilizes the Spot tone orthe Tuning Offset Indicator. The actual offset pitchis set by Menu item “054 CW PITCH”. The offsetpitch may be set to any frequency between 300 Hzand 1050 Hz, in 50 Hz steps. You can either matchtones audibly (using the [SELECT] button) or tunethe receiver frequency so that the central red markeron the Tuning Offset indicator lights up. Note thatthere are 31 “dots” on the Tuning Offset Indicator,and depending on the resolution selected, the incom-ing CW signal may fall outside the visible range ofthe bar indicator, if you are not reasonably close tothe proper alignment of tones. The displayed frequency on CW normally reflectsthe “zero beat” frequency of your offset carrier. Thatis, if you were to listen on USB on 14.100.00 MHzto a signal with a 700 Hz offset, the “zero beat” fre-quency of that CW carrier would be 14.100.70 MHz;the latter frequency is what the FTDX 3000 displays,by default. However, you can change the display tobe identical to what you would see on SSB by usingMenu item “064 CW FREQ DISPLAY” and settingit to “DIRECT FREQ” instead of the default “PITCHOFFSET” setting.[SELECT] Button[MONI] ButtoncW cOnvenience FeaTureSZIN/SPOT IndicatorRetune: Shift to Higher FrequencyRetune: Shift to Lower FrequencyZero-In